Press for stamping flanged end plates and the like



Feb. 24), 1923.

K.. BHLE PRESS FOR STJAJPI'G- Application filerl T 0 oil; whom it may/ concern:

Be it known that I, line ing at Essen-on-the-Ruhr, N zen of the German Republlo have a. certain new and useful lniprm n e, o a Press for Staniping ilano'ed ?hizi Plates and the like, of Which the following; is a specification.

The invention relates to flanging; prosses for the inanutacture of sheet metal plates iianged on the outer riin, Which presses comprise a female die member hayino; nular iianging portion anda stf o l a, fianging portion adapted to enter flanging portion off the ifeinale die member in aXial direction, said ilangino; portio s being separated from each other by a clearance When the flanoing portion ot the stanip hasentered the annuler fiangin portion ol the female die inernber, one of said lianging portions being rigid and the other be. resilient round its Whole *f circrumerence Whereby the Width of said clearonce may be automatically enlarpged during. the prf ing operation. The invention eonsists in providing means operahle at Will 'for che: v'- ing the shape of resilient` Hangi tion in the sense of diininishingz: sair clear-z ance Whereby the advantage isuttained that the resilient ianginr portion may be formed With comparatively small resiliency and oorrespondngly small cross sectioual dirnensions.

1 ne embodiment ot the subject matter of this invention is shown by Way ol2 ex-` ample in the accompanying drawing7 in 'Whichfi -Fig. 1 is a diagranmatic axial longitndh* nal section of the essential parts ot the press here entering into consideraton, v

Figs. 2 and 3 similar views ,illiistnating'A different Working positions said parts,

The portion of the stamp adapted to be` applied'tothe flanged edge (1,1 ot the Work A is formed by a steel ring; B ot ooinparm t face is inclined relatively tothe longitudi-` nal axis otthe press at an angle. Which corlines disposed in the same sxial plane and appertaining to the outer end inner shell surface of the fianged edge ol of theriorl: A after the pressing operation oiving to the increase Which has taken place in the thiclrness of the plate toward the unsupported end of the flanged edge. n o like manner, the shell surface 64, Which faces the lonpgitudinal aris of the press, has also a conic'al shape, the longitudinol aris of Which cone oonverging with the longitudinal aris of the shell surface bi* of rin; B and also With that of the press; The support C of ring B, :forming a part of the starnp is provided with aconical surface clfdisposed coaiially to the oonical surface o* ot the ring; B, and the shell lines of which define conjointly With the longitudinal axis of the press the sameangle ofinclination as the shell lines -protrudingheyond the conical surfao (11: l the front end of this edge itacing the ri mg isu in the position of the parts shown iii l and 2, for acertain distance rei''iote viroin the front end ot the ringvB Which 'faces the edge 02. ln the clear space between the edge 02 end the ring B'there are interposed pieces or bloclrs D. ``l `urther aplate l? is connected to the support C by means of seren' bolts STI? Which plate is adapted to engage bored out section 56 of the ring B. The screw bolt-s E are tightened only sufcient to prevent onr axial displacenient of the ring` B relatively to theV support C While admit'ting said ringito execute radial moveinents. That particular portion of the matrix destined to be applied to the flanged edge ol of the Work` consists ot a *rizid cylindrical ring` G; The diinensionsof the two pressing;` members B and G are so vehosen.V that the maximum `radius of the oonical surface 7 3 of the ring B9 the Stamp being subject to no load41 Will he smallerby the depth of the plate thickness of the Work A than the raclius ,of the ring G.

lWhenthe stainp is lovvered, the Work A heoted to a' red heat and lying` on the matrix ix forced loy the ring B of the die into the ringn G of the matrix (Fig 1): During this fit) . errtent.

operation every diameter of a circle described on the edgepror to the flanging operation, conoentrically to the longitudinal the stamp descends, ring B is pressed together by the parts of the corrugations approaching the longtudinal axis of the press. In the course of this action, the conieal surface 64 of the ring B approaches the conical surface cl of the support C, until toward the end of the lowering motion of the stamp both surfaces make contact (Fig. 2). Hereupon, the press is brought to astop, the intermediate blocks D are removed and at the same time the holder (not shown) on which the Work rests, is secured in its position, so that the work A and the ring B resting on the work,are prevented from executing any axial displacement in the direction of the working stroke of the press. Upon this, the press is again set intoimotion. The conieal surface 01 of the support C, which now alone oontinues its path conjointly With the stamp.

nowcooperates with the eonical surface b* ofthe ring B after the manner of a wedge,

'and expands the ring in the radial direction. As a result, the wave shaped coniigurations in the fianged edge are removed and the flanged edge of the work is forced with its entire outer shell surface against the cylindrical inner Wall of the ring Gr of the matrix, so that it obtains a cylindrical external shell surface (Fig). When, at the end of the lowering motion of the stamp, the plate F has attained the bottom of the work, the edge 02 of the support at the same time `bearing down on the ring B, the press is brought to a stop, and the stamp moved back into its initial position. During` this operation, the conical surface 01 of the support C primarily is brought out of engagement with the oonical surface 54' of ring B, Whereupo'n as the return motion of the stamp proceeds, the plateF bears up against the base portion of the bored out portion ,56

of the ring B and takes this latter along' Hereupon, the conical surface ?93 of the ring B glides along the internal shell surface of the flangediedge al of the work A, clamped in the matrix or else secured therein by means of a guide member, ,(said internalA shell surface having now also obtained a concal configuration o-Wng to the increased Leader/e thickness in plate of the Work), thering -B being pressed together in a radial sense for such a length of time until it has entirely steppedout of the fianged edge. As soon as the stamp has completed its return motion, the intermediate blocks D are again inserted between the edge 02 of the support C and the ring B, and the press is again ready for work.

Claims:

l. A flanging press for the manufacture of sheet metal plates fianged on their outor rim comprising a female die member having an annular flanging portion, a stamp having flanging portion adapted to enter said flanging portion of the female die member in axial direction, said fianging portions being separated from each other by a clearance when the flanging portion of `the stamp has entered the annular flanging portion of the female die member, one of said flanging portions being rigid and the other being adapted to elastically yield transversely to said.

`axial direction round its whole circumferonce in the sense of increasing-the olearance left betweenit and the other flanging portion, whereby the width of said clearance may be automatically enlarged during the pressing operation, and means operable at will for changing the shape of said yielding flanging portion in the sense of diminishing said elearance. 2. A flanging press for the manufacture of sheet metal plates fianged on their outer rim comprising a female die member having a rigid annular fianging portion, a stamp carrying a flanging ring adapted to enter said fianging portion of the female die meinher in aXial direction, said flanging ring be- .in movable relatively to the stamp in VaXial direction between a rearward end position and a forward one, and adapted to elastically vield transversely to said axial direction round its whole circumference in the sense of increasing the olearance' left between it and the flanging portion of said female die member, means for securing said ring in a readily detachable manner relatively to the stamp with respectto axial movement in its forward end position, and a wedge sha-ped portion arranged on the stamp and surrounded by said ring whereby said ring may be extended When moving from its forward end position to its rearward one.

A flanging press for themanufacture of sheet metal plates fianged on their outer rim comprising a female die memtber having a rigid annular flanging portion, a Stamp carrying a flanging ring resilient round its whole circumference and adapted to enter said flanging portion of the female die member in axial direction, said flanging ring being movable relatively to the stamp in aXial direction between a rearward end position and aforward one, a collar arranged lll) to the Stamp with respect to afxial move- KARL BHLE, ment 'n its forward end poston, and 111 pfesence -f wedge shaped portion arranged m1 the Stamp HANS GOTTSMANN,

und surrounded by said ring Whe'eby said JOHANN DEOKERS. 

